Third suspension for brake-beams.



O. F. HUNTOON.- THIRD vSIISPENSIOII FOR BRAKE BEVAMS.

AxrLxuATIoN FVILBD APB. 20,1912.'

Patented May 6, 1913.

' 3 andY substantially UNITED sTATEs PATENT buuren-.-

CHARLES F. HUNTooN, oF CHICAGO, ILLINOIS, AsjsIGNon "ro ELMYR a LAUGHLIN,

or cHIcaoo,4 ILLINOIS.

' THIRD SUSPENSION ron BRAKE-nanars.

specification .of Letters Patent.

l Patented May 6, 1.913.

i Application led April 20, 1912. Serial No. 692,077.

To all 'whom i may concern.'

Be it known that I, CHARLES F. HUNTOON, a citizen of the United States of America, and a resident of Chicago, --county of Cook, State of Illinois, have invented cert-ain new and useful Improvements in Third Suspensions for Brake-Beams, of which the following is'a specification.

The main objects of this invention are toprovide an improvedform-of third suspension for Abrake beams,' which is adapted to coact with the other suspensions andthe pull of the brake rods toninsure. that the faces of the brake shoes will remain substantially concentric .tothe wheels as'the brake shoes are shiftedtoand from vengagement with the wheels, regardless-of wear or turning .down of' the contacting surfaces, and to provide improved means on the strut. for securing the tension member thereto.

An illustrative embodiment of this invention, as applied'to a brake beam of the type described in the patent of-C. F. Huntoon, No. 960,935,.iss ued June 7, 1910, is' shown in the accompanying drawings, in which:

Figure 1 is aside elevation of a brakeI beam having a third suspension constructed according to this invention. Fig. 2 is a fragmentary plan View of the brake beam. Fig. 3 is a fragmentary sectional detail showing the arrangement and construction of the cam. Fig. 4 is -a section taken on the line A--A of Fig. 3;

The brake beam shown in the drawings comprises the usual compressionI member 1, with brake-'heads 2 at its ends, a long strut 3 as in said Huntoon patent, and a tension member' 4. The brake beami s suspended by means of the usual links 5', carried by bracket arms 6 on the truck bolster 7. Brake shoes S'are secured to the brakeheads 2in' the .usual manner. The Athird. suspension shown in the drawings `comprises a dat resilient member orl spring 9 secured'to ,the bolster :7, and of suticient strength'tosupport the end of tlie strut 3. The spring 9 is below lthe strut arallel therewith. In the present construction, the link or shoe of the third suspension ofsaid Huntoon patf ent is re laced by a cam shaped roller 11 which ri es on the spring 9 and is pivo'tally mounted' in the slot l2 formed near theJ outer to a horizontal position. 'has been assembled it is secure against disend of the strut 3. The cam 11 is shaped so that when the brake beam is shiftedtoward the wheel it will roll along thepart 10 of the member 9 and elevate the outer end of `the strut'` so that thev faces 13 .of the shoes 8 will be brought into -substantially-l concentric relation with peripheries 14 of the wheels as the brake shoes approachfthe wheels, and thereby cbt-ain an' even engage` ment of the shoes with the wheels. When the shoes recede from the wheels, thesame concentric relation of the shoes and wheels is maintained. The springt) hasitsouter end turned u wardly to form a shoulder 9' against whit; the cam 11 will abut, .and thereby insure against slipping thereof along the spring.A The cam 11 is weightedvat 15- so' that-t normally hangs in the positionA shown in Fig. 3, and always assumes that position when, through vibration or otherwise, it is lifted from the spring. The ends of the slot 12 form "limit stops 16v for preventing the cam from being turned too far in either direction to give proper support to the beam.v

Lugs or shoulders 17 and 18 are-formed on the end of the strut 3 for supporting the tension member 4, being spaced apart a distance equal to the width of the tension member 4. The shoulder 18 is made somewhat longer than the thickness of 'the tension member and is adapted to be bent u to form a transverse lug 19 at the front o the tension member. When the tension member yis once set in between these-lugs it is secure against accidental disengagement from the strut, throughany jarring of the beam. The tension member 4 vis inserted int-o the seat formed by the lugs 17, 18, and 19be fore the ends lthereof are secured to the compre-ssioir member, bv first tilting the tension member to the posit-ion indicated in dotted outline in Fig. 3 and then tilting it back engagement frm the strut should the ,com-

:pression membei` be suddenly strained to an .extent that would otherwise tend to separate the tension member vand strut.'

lso

After the beam Although but one specific embodiment of this invention is hereiiishown and described, it will be understood that some ofthe details of the construction shown vma f be altered Or omitted without departing in the spirit of thisl invpntion, as deiinedby the following claims.

` thefppurpose.specifiedi 'une 'stantially horizontally disposed supporting`v` In arthir suspension for brakebeams,

'porting member, lforl the purpose? 'specifieds" 'transversely disposed strut, a lsubstn'nti:il-ly.

'and a-.Cam pivoted tosuid strut` I olaimi*l l. In a third suspension for brake beams, the combination of a brake beam, sup.- porting member, and av cam interposed between said brake beam 'and said supportn; ,r4 member .for the purpose specified.

.2. In a thirdsuspension for brakebeanis, the combination of a brake beam, a submember, and a cam interposed between said the purposes ecied.

the combination lot' abrake beam; a resili-l ent supporting member, vandy a cam' inter-v posed'rbetween said brake beam and said' supporting/member, for the purpose speci# tied.v

"'.4. ./In athirdsuspension for braltebeams, the 4"eombination-'of a brake beam, aisub' stant'ia1ly-' horizontally l disposedV supporting member, and a cam' carried by said brake beam? and Y' adapted to. coactv with fsaid' slip 'fn-Ina -third suspension for brake beams# the combination of 'Ia' brake'beamhavingrfu transversely; disposed str iit, a substantially;- horizontallv lfdisposed Esupportingi member,A an f 1.a cam -fruter osed between. said support-g ingf-memberzan fthe.' 'end fof fsad strnt, for:

:6. In alt-bird su'spensionifor brake beziins,l f

theA combina-tion off abrake` 'beam havi'ng n horizontally disposed supporting 'l member,

nd adapb- I ed to npon said sopporting member, for

.the .purpose s ecified.

7.V In a thir suspension for brake beams, the combination of a brake beam having a transverselydisposed strut, a flat resilient supporting member having a portion thereof horizontally disposed below said strut, anda cam carried att-he 'end of said strut and adaptedv to bear upon the horizontal portion of said supporting member, for the lpurpose specified; 1

8. In a'third suspension4 for brakebeams, the combination-of a brake' beam,1a -substantially horizontally disposed supporting. member, axcam carried by said brake .beam and adapted 4to coaet Withsaid supporting member, and a shoulder onsaid supporting member adapted to engagesaid, cam, for

9. In a thirdv suspension for brake beams,-v

thelcombin'atmntof afbrake beam Ahavirrga transversely disposed strut, a" substantialll,`

horizontally disposed-supporting member, 

